Pump jack



Nov. 29, '1927o ,650,825 H. W. EGGERS PUMP JACK Filed Nov. 30, 1925 /Q/ 'H/p l aL-@i4 {Muni-ma l l A j /g g@ raeaaa Nev. 2e, 1927.

.bmreufs'rars l f tetas-a5 en,'rflztu;A omc/e. j

nnivnrw. Essens, or masserie, Wisconsin.

PUMP JACK'.

,- `aiip1iefan fnlinea November so, 1.9525.'k serial No. 72,195.

present invention relates to `pump provided, in-accordance with one 4feature of the invention,- a bearingplate rmly secured Atothe housing ofgapiimsaid bearing plate having la transigerse shaft mounted for rota tion therein,.with a pulley mounted centrally of said shaft. A pair of drive pinions mounted on the shaft are positioned to actuate two beveled gears journaled in the bearing plate. The shafts upon which said bevel gears are mounted extend beyond the front surface of said bearing plate, each being provided with a small spur gear thereon. The spur gears are mounted to engage a pair of internally toothed gears, each of said gears having drive arms pivotally connected thereto and extending vertically upward therefrom. rlhe arms are pivotally connected at their upper ends to a cross beam mount# ed upon a lift rod of the pump on which the device is mounted. y

These and' other features of the invention, not specifically mentioned, will be more fully brought out in the following description and the accompany drawings, wherein: i

Figure 1, is a view in front elevation of a pump having the device mounted thereon, a 40 portion of a gear being broken away to show the position of a spur gear therein. Figure 2, is a sectional view on the line 2-2 of Figure 1; and

Figure 3, is an enlarged rod connection.

Referring to the drawings in detail, a plate A. has thereon a pair of journals 1 and 2, in which is mounted for rotation a shaft 3. The shaft has a driven pulley 4: keyed thereto which may be actuated from a suitable source of power by means of a belt, not shown. Pinionus 5 and' 6 are mounted on the shaft 3 on either side of the pulley fl, to engage beveled gears 7 and 8, which are mounted upon shafts 9 and 10 journaled in the bearing plate to extend entirely through view of aV pivotal In order. to attain l thesej obj said andproject beyond the other face thereof. Mounted upon the other ends of `the shafts 9 and 10 from the gears 7 and 8 are 4spur gears 11 and` 12 which engage internally toothedgears 13 and 1e pivoted for .rotationupon stub shafts 15 and 16. The

mechanism on the rear of the mounting plate t1s encased. inapl irof cover members 32 and -ywhich may be "of sheet metal.

The forward faces .of the internally studs onthe `face of one gear being reversed `in position from vthose on the` other gear.

toothed` gears are `provided `withiua plurality. of studs,17, 18, and 19,` spaced outwardly- `fromthe center at varying distances, the

A bolt 20, havingy a threaded` lower portion of a size to engage the tapped -openings' in the studs andan enlarged upper portion to act as a drive pin is provided for each of the gears 13 and 14. A pair of bearing members 21 have openings therein of a size to journal the enlarged upper portion of the bolts 20 and are connected to push rods 22 as by means of bolts 23. i The push rods may be of wood, `and are each provided at their upper ends with'a second bearing member 24 having pivotal .engagement with a yoke 25. The yoke is connected at its center point to the actuatingl rod26 of a pump B, with which the jaclris intended to be used.

`In operation, the pulley, 4 is rotated' from a suitable source of power by means of a belt, not shown, to rotate the shaft 8. This' rotates the pinions 5 and 6, which, being positioned at opposite sides of the beveled gears, 7 and 8, cause the beveled gears to rotate in opposite directions. by meansof shafts 9 and 10 and the spur gears 11 andV 12, causes thev internally toothed gears 13 and 14; to rotate in opposite directions. The push rods 22 translate the rotary motion` of the internally toothed gears into a vertical reciprocatory motion which drives the pump rodv 26 up and down to draw water from a. well with which it is This in turn, y

associated. The pull of the drive belt is in Y the same plane as the central vertical axis vof the pump which eliminates any torque f clamp 27 and the mounting plate A to rmly clampthe parts to the pump B.

The pinions 5 and 6 engage the beveled gears 7 and 8` on opposite sides, causing the thrustof said gearsto be in opposite directions about the center of the *plate AV upon which they are mounted, thus neutralizing the torques thereof. The spur gears A11, and 12 are also rotated in opposite directions which lneutralizes the'torque at this point.

"i rods, 22 in a plane with the'central vertical axis' ofthe pump gives a V.straight up and ,'downimotionto thep'umprod with no disy ,placing force 'acting thereon as'where the pshjf rods move 'beyondvv the plane of said vertical axis."V

` By changing the p'ositionof thel push rod bearings 21 fromone'setofstuds, such as17, -to another set, such as 18, located at a diierent distance from the center, the length of the'stroke of the actuating rod 26 maybe varied and the jack thus adapted for wells ,of different idepth and pumps of dierent construction and capacities.

What I claim is: In combination with a pump and rod, a

mounting plate having an offset central por tion shaped to tit a side of said pump, a clamp member cooperating with said central portion to clamp the plate to said pump, a pairlof bearing-journals carried by said plate, a shaft rotatably mounted therein, bevel gears mounted onsaid shaft to rotate therewith, `a pair of shafts y'pivotally mountled on said plate to extendl therethrough,'and having'beveled gears-carried-thereby to cooperatey with the bevel lgears of-said shaft, -a pinion borne-by each of said airs of shafts, and a toothed wheel mounte on eitherside of said shaft in a vplane substantially centrally at saidk pinion lto be operated by said pinions'and havin iladjustable, operative connectionwithsai pump rod.k In testimony whereofl aix m vsi ature. 

